Method of making louvers



Nov. 23, 1926. 1,608,483 R. J. TURNBULL ET AL v IMETHOD OF MAKING`LOUVEJRS original Fi'leq July 27, 1925 l'ig A HW) mll'l Patented Nov.23, 1926.

il hllTE STA TE 1,608,483 PATENT OFFI E..

ROBERT J'. TURNBULL .AND GEQRGE Gr. LYNCH, OF W'ILMINGTON, NORTHCAROLINA..

ninrnonI or Maxine Lonvnns.

Originalpappleaton filed July 27, 1925, Serialy No. 46,451.7.. Dividedand this application` filed December This invention relates toventilators, and more particularly to a method of manufacturingventilator louvers, and is a division of our application Serial No.46,457, filed July 27, 1925. The invention has for its object to providea cheap and expeditious method whereby louvers of great strength andefliciency may be manufactured at a minimum cost` w TWith these objectsin vieiv, the invention consists in forming the body of the louver at asingle operation and simultaneously providing said body with an openingWhereby means for connecting the louver to an operating rod may beexpeditiously and eiliciently secured thereto, and also in the sameoperation, so shaping the louver as to en able the pivoting means forthe louver to be quickly and securely iixedthereto, preferably by spotWelding.

For the purpose of facilitating the description of the invention,reference is made to the accompanying drawings, in which,

Fig. l illustrates a rectangular piece of sheet metal, such as sheetiron, sheet steel or sheetl copper;

Fig. 2 is a perspective view of the sheet shown in Fig. 1 after the samehas been shaped as by a single operation;

i Fig. 3 illustrates one form of the louver complete, with the pivotmeans and the device for connecting the same to the operating rod;

Fig. 4 is a section on the line 4wd of Fig. 3; and

Fig. 5 is a section on the line 5-5 of Fig. 3.

In said drawings, like reference numerals indicate like parts throughoutthe several views. In practicing the invention, We take a sheet 6 of anysuitable metal, as sheet iron, sheet steel, sheet copper, of the lengthof the desired louver and of a suitable Width, and each louver is thenstamped or otherwise formed from said metal stock in a suitable machineby a single operation, as for example in a stamping machine, so as toproduce a substantially Wide medial portion 7. and reversely bentnarrower front and rear flange portions 8 and 9. At the sam-e vtime thebending on the line of flange portion 9 is intended to receive the pivotmeans for the louvers. and a hole 10 (Fig. 2) is punched centrally ofthe louver in the medial portion adjacent the bending line et flange a.

Serial No. 78,656.

The indentations ll may be` of any desired length, even to the extent ofthe entire length of the bending line of the flange 9, Without departingfrom the spirit of the invention, andltliepivot may be Separate pins l2,l2, as shown, or in any other form, and located in the indentations andsecured ther-cin by spot` Welding or otherwise. Each louver is thenprovided with a suitable means for connecting the louver to an operatingrod, which means-is here shoivn in the forni of a clevis 13, preferablyU-shaped in cross-section and secured to the louver by a rivet ld whichpasses through the bottom of the clcvis and through the opening 10. Thelouver and the clevis are then further secured together at the sides ofthe clevis by spotl Welding as indicated at l5, l5 (Fig. t), whereby theclevis is preventedfrom turning on the pivot and Working loose.

By manufacturing the louver in accord ance With the method described, alouver of great strength and simplicity of construction is secured,While the materials employed and the steps necessary in the manufacturethereof enable us to produce a louver of superior quality and at minimumcost.

What is claimed is l. The method of making ventilator louvers whichcomprises reve-rsely bending opposite edge portions of a piece of metalstock to form flanges defining a medial portion and simultaneouslyindenting the bending line ot one of the flanges, and then securingpivot means along said indented bending line.

2. The method of making ventilator louvers, which comprises reverselybending opposite edge portions of a piece of metal stock to form flangesdefining a medial portion and simultaneously indenting the bending lineof one of the flanges and punching a Clovis-attaching opening centrallyof the article adjacent the bending line of the other flange.

3. The method of making ventilator louvers Which comprises rev-erselybending opposed edges of a piece of metal stock to provide al medialportion and a pair of flanges and simultaneously indenting each end ofthe article on the bending line of one of the flanges to form a pair ofpivot pin depressions. securing a pair of pivotpins in said depressionsby Welding, and formill) said inedial portion and near the bending lineof the other flange.

4. The method of making ventilator louvers which comprises reverselybending Opposed edges of a piece of metal stock to form flanges defininga medial portion Wider than the flanges and simultaneously indenting theends of the article on the bending line of one of the flanges to form apair ot' pivot pin depressions and forming a clevis attaching opening insaid medial portion adjacent the bending line ot' the other flange, andsecuring a pair of pivot pins in said depressions by spot Welding.

5. The method of making ventilator louvers, which comprises reverselybending the edges of an elongated piece of metal stock to provideflanges thereon and simultaneously indenting each end of the article onthe bending line of one of the flanges to form pivotpin receivingdepressions and punching a hole centrally of the article adjacent thebending line of the other lange, whereby a clevis may be secured to thelouv-er. Y

6. The method 0f making ventilator lonvers, which comprises leverselybending the edges of an elongated piece of metal Stoch to provideflanges thereon and simultaneousi ly indenting each end of the articleon the bending line ot' one of the flanges to ferm pivot pindepressions, and then securing pivot pins in said depressions by spotWelding.

In testimony whereof We have signed this specification.

' ROBERT J. TURNBULL.

GEORGE G. LYNCH.

